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8173361: various crashes in JvmtiExport::post_compiled_method_load

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Don't post information that uses metadata from unloaded nmethods

Reviewed-by: eosterlund, dholmes, sspitsyn
This commit is contained in:
Coleen Phillimore 2019-12-02 08:40:52 -05:00
parent 67e0f3b490
commit b1d915ef80
9 changed files with 87 additions and 24 deletions
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18
src/hotspot/share/code/nmethod.cpp
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@ -1565,14 +1565,18 @@ void nmethod::flush_dependencies(bool delete_immediately) {
// Transfer information from compilation to jvmti
void nmethod::post_compiled_method_load_event() {
Method* moop = method();
// This is a bad time for a safepoint. We don't want
// this nmethod to get unloaded while we're queueing the event.
NoSafepointVerifier nsv;
Method* m = method();
HOTSPOT_COMPILED_METHOD_LOAD(
(char *) moop->klass_name()->bytes(),
moop->klass_name()->utf8_length(),
(char *) moop->name()->bytes(),
moop->name()->utf8_length(),
(char *) moop->signature()->bytes(),
moop->signature()->utf8_length(),
(char *) m->klass_name()->bytes(),
m->klass_name()->utf8_length(),
(char *) m->name()->bytes(),
m->name()->utf8_length(),
(char *) m->signature()->bytes(),
m->signature()->utf8_length(),
insts_begin(), insts_size());
if (JvmtiExport::should_post_compiled_method_load() ||